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第一周 《周易》导读

第一周《周易》导读测验

1、单选题：
‎‍孔子对周易的主要功绩是‍
选项：
A: 撰写易传
B: 撰写卦辞 ‍
C: 撰写爻辞
D: 发明六十四卦
答案: 【 撰写易传】点我阅读全文

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Unit 1 preface

Unit 1

1、判断题：
​The island of Great Britain is geographically divided into three parts: England, Scotland and Wales​​​
选项：
A: 正确
B: 错误
答案: 【 正确】点我阅读全文

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第一章 金属切削过程的基础知识

单元测验

1、单选题：
用Z=20的端铣刀，选n=120r/min、vf=480mm/min，则铣刀每齿进给量是（      ）。‌‎ ‌
选项：
A: 0.1mm  
B: 0.2mm 
C: 0.3mm
D: 0.4mm
答案: 【 0.2mm 】点我阅读全文

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Lesson 2

Scanning

1、单选题：
‌Read the passage "The Discovery of X-rays" quickly and choose the paragraph(s) which contain(s) the answer(s). You may choose more than one answer for question 3. ‌‌‌The Discovery of X-rays‌‌ ‌Par. 1 Except for a brief description of the Compton effect, and a few other remarks, we have postponed the discussion of X-rays until the present chapter because it is particularly convenient to treat X-ray spectra after treating optical spectra. Although this ordering may have given the reader a distorted impression of the historical importance of X-rays, this impression will be corrected shortly as we describe the crucial role played by X-rays in the development of modern physics.‌Par. 2 X-rays were discovered in 1895 by Roentgen while studying the phenomena of gaseous discharge. Using a cathode ray tube with a high voltage of several tens of kilovolts, he noticed that salts of barium would fluoresce when brought near the tube, although nothing visible was emitted by the tube. This effect persisted when the tube was wrapped with a layer of black cardboard. Roentgen soon established that the agency responsible for the fluorescence originated at the point at which the stream of energetic electrons struck the glass wall of the tube. Because of its unknown nature, he gave this agency the name X-rays. He found that X-rays could manifest themselves by darkening wrapped photographic plates, discharging charged electroscopes, as well as by causing fluorescence in a number of different substances. He also found that X-rays can penetrate considerable thicknesses of materials of low atomic number, whereas substances of high atomic number are relatively opaque. Roentgen took the first steps in identifying the nature of X-rays by using a system of slits to show that (1) they travel in straight lines, and that (2) they are uncharged, because they are not deflected by electric or magnetic fields.‌Par. 3 The discovery of X-rays aroused the interest of all physicists, and many joined in the investigation of their properties. In 1899 Haga and Wind performed a single slit diffraction experiment with X-rays which showed that (3) X-rays are a wave motion phenomenon, and, from the size of the diffraction pattern, their wavelength could be estimated to be 10-8 cm. In 1906 Barkla proved that (4) the waves are transverse by showing that they can be polarized by scattering from many materials.‌Par. 4 There is, of course, no longer anything unknown about the nature of X-rays. They are electromagnetic radiation of exactly the same nature as visible light, except that their wavelength is several orders of magnitude shorter. This conclusion follows from comparing properties 1 through 4 with the similar properties of visible light, but it was actually postulated by Thomson several years before all these properties were known. Thomson argued that X-rays are electromagnetic radiation because such radiation would be expected to be emitted from the point at which the electrons strike the wall of a cathode ray tube. At this point, the electrons suffer very violent accelerations in coming to a stop and, according to classical electromagnetic theory, all accelerated charged particles emit electromagnetic radiations. We shall see later that this explanation of the production of X-rays is at least partially correct.‌Par. 5 In common with other electromagnetic radiations, X-rays exhibit particle-like aspects as well as wave-like aspects. The reader will recall that the Compton effect, which is one of the most convincing demonstrations of the existence of quanta, was originally observed with electromagnetic radiation in the X-ray region of wavelengths.‌‌‌‌When were X-rays discovered?‌
选项：
A: Par. 1
B: Par. 2
C: Par. 3
D: Par. 4
E: Par. 5
答案: 【 Par. 2】点我阅读全文

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Chapter Five Syntax

5.1 Concept of grammar_习题

1、单选题：
A sentence is considered ____ when it does not conform to the grammatical knowledge in the mind of native speakers. ​‏​
选项：
A: right 
B: wrong 
C:  grammatical  
D: ungrammatical
答案: 【 ungrammatical】点我阅读全文

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第一周 《中国哲学》课程绪论； “先秦诸子”之先秦儒家

第一周 《中国哲学》课程绪论； “先秦诸子”之先秦儒家（单元测验）

1、单选题：
下列哪一项不是中国传统哲学的主题？‏‎‏
选项：
A: 天道
B: 人道
C: 儒、道
D: 思辨
答案: 【 思辨】点我阅读全文

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第一讲 语言究竟是什么

第一讲测验

1、单选题：
‏Which of the following statements is NOT true about language?‍
选项：
A: Language is a sound system.
B: Language is a set of symbols.
C: Language must have both spoken form and written form.
D: Language is systemic.
答案: 【 Language must have both spoken form and written form.】点我阅读全文

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第1章计算机技术与审计、第2章承接审计业务

第1章第2章单元测试

1、单选题：
‎下列信息技术下关于内部控制的说法错误的是（ ）。‎
选项：
A: 随着信息技术的发展，内部控制在形式和内涵方面发生了变化
B: 信息技术的发展改变了内部控制的目标
C: 提高会计信息的可靠性属于内部控制的目标
D: 信息技术在改进被审计单位内部控制的同时，也产生了特定的风险
答案: 【 信息技术的发展改变了内部控制的目标】点我阅读全文

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大气污染影响

2-1 硫酸烟雾

1、单选题：
​具有代表性的硫酸烟雾污染事件是      ‎
选项：
A: 洛杉矶光化学烟雾事件
B: 骨痛病事件
C: 印度博帕尔事件
D: 伦敦烟雾事件
答案: 【 伦敦烟雾事件】点我阅读全文

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第01周 职业认知未来工作方式变了么？

1.5同步练习

1、单选题：
‌如果强迫自己去做那些不适合自己的、模仿别人的事情，就无法从内心深处投入足够的精力和激情。在这种状态下，即使尽了 200% 的努力，也往往事与愿违。这要求我们在有效管理大学生涯时，应注意：‏
选项：
A: 控制局面，不管事情重要与否，先完成最紧急的
B: 运用“二八”原则
C: 严格规定完成期限
D: 明确价值观是前提
答案: 【 明确价值观是前提】点我阅读全文

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